On 04/22/2013 03:36 PM, Werner Almesberger wrote: > Using the (nearly) mainline kernel (net-next, closely tracking 3.9), > one can almost build a working kernel for the Ben. "Working" here > means that it gets to a shell on the serial console. > > In the OpenWRT build process, a fairly large number of kernel > patches gets applied. They live here: > > http://projects.qi-hardware.com/index.php/p/openwrt-xburst/source/tree/master/target/linux/xburst/patches-3.3 > > I found that just one of them is essential for getting the system to > boot: > > 0020-qi_lb60-NAND-add-data-partition.patch > > I also used > > 0008-qi_lb60-Don-t-use-3-wire-spi-mode-for-the-display-fo.patch > > to get fewer complaints from the kernel. > > To boot a mainline kernel, I also had to override the boot command > line and add init=/etc/preinit (OpenWRT traditionally had a kernel > hack that added this directly to init/main.c, but I don't know if > they still use this. In any case, our u-boot setup seems to expect > the kernel to find preinit on its own, which it doesn't.) > > With this, I get to a shell and can play with ATBEN and such. > > Since I'm using a "headless" board, I don't know whether the screen > would actually work. The absence of > > 0007-Add-ili8960-lcd-driver.patch > > in mainline suggests that it won't. Another thing that's missing > is the USB driver, > > 0002-Add-jz4740-udc-driver.patch > > The rest of those 3.3 patches are mainly about NAND optimizations, > audio, power saving, wireless, and assorted minor changes. > > I wonder what the status of all those patches is. Have they been > submitted towards upstream ? If yes, have they been accepted by > the respective subsystem maintainers and just haven't propagated > into Linus' tree yet ? Is someone tracking them ?
Some are upstream, some are not. Those which are not upstream are primarily not upstream because they aren't quite ready yet and need some more love. E.g. There is already a driver for the usb gadget core in upstream (musb). But it is used on a couple of SoCs and somebody needs to sit down and write the jz4740 glue code. - Lars _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
